Citation: Wenhui Tu, Yuanpeng Cao, Xianshu Wang, Bo Liao, Xiaoyu Ding, Junru Wu, Xiangshao Yin, Zhuo Zhou, Yuanyuan Huang, Runlin Li, Xinyu Zhang, Chao Zhao, Peng Dong, Yingjie Zhang, Ding Wang, Xuerui Yang, Jianguo Duan. Multifunctional silane additive realizing electrolyte stabilization and hierarchic interface formation for LiMn_0.60Fe_0.40PO₄ cathode materials[J]. Chinese Chemical Letters, ;2026, 37(10): 111594. doi: 10.1016/j.cclet.2025.111594 shu

Multifunctional silane additive realizing electrolyte stabilization and hierarchic interface formation for LiMn_0.60Fe_0.40PO₄ cathode materials

Wenhui Tu ^a ,
Yuanpeng Cao ^a ,
Xianshu Wang ^{a, *,} ,
Bo Liao ^b ,
Xiaoyu Ding ^c ,
Junru Wu ^d ,
Xiangshao Yin ^a ,
Zhuo Zhou ^a ,
Yuanyuan Huang ^a ,
Runlin Li ^a ,
Xinyu Zhang ^a ,
Chao Zhao ^e ,
Peng Dong ^a ,
Yingjie Zhang ^a ,
Ding Wang ^{a, *,} ,
Xuerui Yang ^{f, *,} ,
Jianguo Duan ^{a, *,}

a.
National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, School of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
b.
Guangzhou Tinci Material Technology Co., Ltd., Guangzhou 510760, China
c.
Zhejiang Narada Power Source Co., Ltd., Hangzhou 310030, China
d.
Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
e.
School of Materials Science and Engineering, Central South University, Changsha 410083, China
f.
School of Physics and Materials Science, Jiangxi Province Key Laboratory of Lithium-ion Battery Materials and Application, Nanchang University, Nanchang 330031, China

xswang2016@m.scnu.edu.cn

wangding@kust.edu.cn

yangxuerui@ncu.edu.cn

duanjianguo@kmust.edu.cn

Received Date: 6 May 2025
Revised Date: 4 July 2025
Accepted Date: 16 July 2025
Available Online: 16 July 2025

Figures(6)

Olivine-type LiMn_xFe_1-xPO₄ (LMFP) cathode materials with high energy density (≈700 Wh/kg) and high discharge platform (4.1 V vs. Li⁺/Li), have attracted considerable interest and prominence in the realm of lithium-ion batteries (LIBs). Nevertheless, the cycling stability of LMFP highly associated with electrolyte compatibility, which suffers from the subsistent transition-metal dissolution under hydrofluoric acid (HF) corrosion and unstable interface formation, posing significant challenges. Herein, we demonstrate that a multifunctional electrolyte additive, (Trimethylsilyl)methyl acetate (TMSA), possesses the good compatibility with LiMn_0.60Fe_0.40PO₄ cathode material. Its features are embodied in the HF elimination, proton coordination and hierarchic cathode electrolyte interface (CEI) formation to prevent electrolyte decomposition and swelling of conductive carbon layer inside materials. Therefore, the LiMn_0.60Fe_0.40PO₄ǁLi batteries can sustain the significantly enhanced capacity retentions of 67.5% after 500 cycles at room temperature (25 ℃) and 74.4% after 400 cycles at high temperature of 55 ℃, even contributing to an improved specific capacity of 113.8 mAh/g at 15 C rate (vs. 88.1 mAh/g in the counterpart). Impressively, LiMn_0.60Fe_0.40PO₄ǁgraphite pouch cell retains a 93.76% capacity after 300 cycles. These much better electrochemical performances from the facile yet available design of electrolyte additive shows the great importance and potential for the developments of LiMn_0.60Fe_0.40PO₄-based LIBs.
- Lithium-ion batteries,
- Lithium manganese iron phosphate (LiMn_0.60Fe_0.40PO₄),
- Silane,
- Electrolyte additive,
- Hierarchic interface
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沈阳化工大学材料科学与工程学院沈阳 110142

Multifunctional silane additive realizing electrolyte stabilization and hierarchic interface formation for LiMn0.60Fe0.40PO4 cathode materials

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通讯作者: 陈斌, bchen63@163.com

Multifunctional silane additive realizing electrolyte stabilization and hierarchic interface formation for LiMn_0.60Fe_0.40PO₄ cathode materials